| 18N-1C | 1.466 | 19H-18N-1C | 109 | 20H-18N-1C-15N | −65 |
| 19H-18N | 1.019 | 20H-18N-1C | 110 | 21N-1C-15N-18N | 119 |
| 20H-18N | 1.019 | 21N-1C-15N | 113 | 22H-21N-1C-15N | −65 |
| 21N-1C | 1.452 | 22H-21N-1C | 106 | 23N-12C-9C-6C | 63 |
| 22H-21N | 1.019 | 23N-12C-9C | 111 | 24H-23N-12C-9C | 73 |
| 23N-12C | 1.459 | 24H-23N-12C | 108 | 25H-23N-12C-9C | −173 |
| 24H-23N | 1.023 | 25H-23N-12C | 109 | 26O-14C-12C-9C | −106 |
| 25H-23N | 1.023 | 26O-14C-12C | 125 | 27O-14C-12C-9C | 73 |
| 26O=14C | 1.212 | 27O-14C-12C | 112 | 28H-27C-14C-12C | 180 |
| 27O-14C | 1.356 | 28H-27C-14C | 106 |
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| 28H-27C | 0.976 |
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